diff --git a/pkg/updater/updater.go b/pkg/updater/updater.go
index 74a7acb..02b1ccf 100644
--- a/pkg/updater/updater.go
+++ b/pkg/updater/updater.go
@@ -152,7 +152,7 @@ func (u *Updater) Start(ctx context.Context) <-chan struct{} {
 							return fmt.Errorf("failed to get commitment: %w", err)
 						}
 
-						l2Block, err := u.l2Client.BlockByNumber(ctx, big.NewInt(int64(commitment.BlockNumber)))
+						l2Block, err := u.l2Client.BlockByNumber(ctx, new(big.Int).SetUint64(commitment.BlockNumber))
 						if err != nil {
 							return fmt.Errorf("failed to get L2 Block: %w", err)
 						}